A pair of equal gravitational forces ... one in each direction ...
exists between every speck of mass in the universe and every
other speck of mass.
Answer:
The wavelength of the wave is 20 m.
Explanation:
Given that,
Amplitude = 10 cm
Radial frequency 
Bulk modulus = 40 MPa
Density = 1000 kg/m³
We need to calculate the velocity of the wave in the medium
Using formula of velocity

Put the value into the formula


We need to calculate the wavelength
Using formula of wavelength


Put the value into the formula


Hence, The wavelength of the wave is 20 m.
Answer:
17×10² km/h
10×10² mph
east to west
Explanation:
Circumference of Earth

Speed = Distance / Time

Converting to mph


The velocity of the plane must be 17×10² km/h or 10×10² mph
The plane must fly east to west